Centrifugal pump.



J. VALK.

GENTRIFUGAL PUMP. APPLICATION FILED maf/,1906.

'Patented sept. 7, 1909.

wi h1 @aow l o Clttoznuo iAMns VALK, or TOPEKA, Kansas.V

CENTBIFUGAL PUMP.

Specification of Letters Patent. Patented Sept. 7, 1909.

Application lel December 7, 1908. Serial No. `166,3611.

To al whom 'it may concern:

Be it knownthat I, J AMES VALK, a citizen i of the United States,residing at Topeka, in

the county'of Shawnee andbtate of Kansas, have invented a new and usefulCentrifugal lunip, of which the following is a specification. y

This invention relates to centrifugal pumps of that type utilizing Varevoluble 11npeller constructed to receive at its center the liquid tobe forced and to discharge `the said liquid from the peripheryof theimpeller along substantially tangential lines.

The object of the invention is to so con-4 struct and arrange the partsof the pump as yto reduce tothe minimum the resistance caused by thefriction of vWater upon the iinpeller. i

Another obj ect is to provide means Whereby the passage of the Water orother fluid to be forced is subjected to the minimum resistance 4withinthe impeller.

A still further object is to provide novel means for coupling the pumpto the suction pipe thereof, said means including a valve designed toautomatically close when the pump is inactive.

With these and other objects in view the invention consists of certainnovelV vdetails of construction and combinations of parts hereinaftermore fully described-and pointedk out vinthe claims.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings z-Figure 1 is a horizontal section through a pumpembodying the present improvement, the impeller being shown .partly inplan and partly in section. Fig. 2 is a section on line A-B F ig. 1.

Referring to the figures by characters of reference U designates thecasing of the pump, the saine preferably consisting of similar spacedconical heads 1 and 2, each of which is surrounded by a flat annularportion 3 rounded at its periphery as indicated at 4, the two roundedportions being boltedv or otherwise secured together at their outeredges to forni a volute 5, from which the discharge pipe 6 extends. Anopening 7 is formed at the apex of the head 2, and bolted to this headis a thinible 8 extending beyondy the opening and having an inwardlyd-ireeted flange S) against which the head 2 abuts. This thiinble isexteriorly screwthreaded and is engaged by a coupling mein'- ber 10into4 thc. outer end of which is threaded the suction pipe-*11 of thepump.

A ring 12 is secured within the coupling 10 and upon the endof thesuction pipell, and

constitutes the seat of a ball valve 13 heldk against displacement by aspider 1&1 secured within the coupling k10. A ring 15 is threaded intothe thiinbleS as shown particnlarly in Fig.2 and has an .inwardlydirected flange 16 constituting an end bearing as hereinafter set forth.

` LExtending diametrically upon the concave l.face of the'head 1 is across-bar 17 in the middle portion of which is journaled a shaft 18.vThis shaft has a pulley 19 at its Aouter end, while its inner end isprovided with an angular head 20 located in the spacev formed betweenthe two heads 1 and 2. 1t is of course to be understood that suitablemeans such as a gland 21 maybe provided ,for`

this extension communicates with the circular bore 23 through `a seriesof preferably three passages 25 formed within the conical portion" 21and the annular portion 22 of the iinpeller, saidpassages being'curved.op`

positely to the direction ofrotation ofthe iinpeller so as to cause thedischarge of .liquid from said passages along lines substantially,v

tangential to the direction of rotation of the iinpeller. Outletopenings 26 are formed in the periphery of the iinpeller at pointsbetween the. outlets of passages 25, so that the fluid after leaving'said passages will be directed longitudinally of the bore 23 until itreaches the nearest outlet opening 2G. A socket 27 is formed in themiddle portion of the iinpeller and is designed to receive the head 20of shaft 18. v

In operation the iinpeller D is rotated in any referred manner throughthe pulley 19 and the shaft 18, the direction of rotation beingindicated-by the arrows in Fig. 1. The fluid to be forced is suckedthrough the pipe 11 and into the coupling 10 and thence through the.tubular extension 24, from which it is discharged by centrifugal forcethrough the passages 25. These passages being curved in the mannerdescribed will di-` rect the fluid in streams along lines of leastresistance, said streams entering the .circular core 23 and travelingtheiein until they reach the nearest outlet openings 26, whereupon theliquid will be thrown outwardly into the volute 5, and thus dischargedthrough the pipe 6., Importance is attached to the fact that the liquidupon entering'the impeller is not immediately deiiected along linesperpendicularto the aXis of the ini-- departing from the spirit orsacrificing thel advantages lof the invention.

Although the pump has been shown with the iinpeller disposed in asubstantially yhorizontal position, it is to be understood that the samecan be arranged in any other desired manner and it will operateasetiiciently in one position as in any other in which it may be placed.

What is claimed is 1. In a centrifugal pump an iinpeller having aconical central portion and 4a iiat annular portion, there being aninlet at the apex of the conical portion, and outlets in the peripheryof the annular portion, said -conical portion having curved passages forconducting `fiuid from the inlet to the outlets, said passagescommunicating Within the iinpeller and adjacent the periphery thereof.

2. In a centrifugalpuinp a casing havin a cent-ral inlet and atangential outlet, an an iinpeller mounted for rotationwithin ythecasing and having a conical central portion*l and a flat annularportion, there being a circular passage within the iinpeller adjacentthe periphery thereof'and -means for conducting fluid along curved linesfrom the middle of the iinpeller to said passage, there being outletswithin the periphery of the iinpeller and opening from saidA passage. l

if. [n a centrifugal pump a casing having a central inlet and atangentialoutlet, and an impeller mounted for rotation Within thecasing, said iinpeller consisting of a central conical portion and an.annular flat portion,

therebeing an inletat the apexeof thecon ical portion und vperipheraloutlets, the iin-` peller having a circular passage opening into theoutlets, and curved passages for coni ducting Huid from the inlet to thecircular passage.

4. A centrifugal pump comprising a cas# ing having a central inlet and atangential outlet, a valve for controlling the admissionv'of fiuid tothe inlet,'and Ian iinpeller mounted for' rotation Within the casing and'consisting of a `central"conica-l portionan'd an'` integral fiatannular` portion, there being anl inlet inthe apex of the conicalportion and outlets within the peripheral portion of the impeller, saidiinpeller having' a circular passage adjacent t ie periphery thereof andpassages *for directing fluid along curved lines from the inlet to thecircular passage.

5. A centrifugal pump comprising a vcasing having a, central conicalportion and a flat annular portion'there being an inlety in the apex ofthe'- conical portion and a tan-- gential outlet in said annularportion, and an im'pellermounted for rotation Within the casing andconsisting `of a central conicalv portion, and a flat annular portion,there heing an inlet within the apex of the conical portion and-outletswithin the periphery of i the annular portion, and means for directingfluid along curved lines from the inlet and Within the iinpeller to theoutlets, said means'communicating at points adjacent the outlets andWithin the iinpeller.

6. A centrifugal pump comprisinga casing having a central inlet and atangential outlet, and an iinpeller mounted forv rotation within thecasing, said iinpeller havinga `central conical portion and a flatannular portion, there being an'inlet in thefapexof' the conical portionand outlets in the periphery of the annularlportion, said im'pellerhaving a circular `passage therein opening" into the outlet, andpassages for directing fluid along curved lines' from the inlet of. theimpeller and through said impeller to thek circular lpassage at pointsbetween the outlets.

In testimony that I claim the foregoing as my own, I have heretoaiiixedmy signature in the presence oftwo witnesses.

Witnesses: Y

' JAS. M. WALKER, lJ. Ross CoLHoUN.

JAMES vALK. f

